Add rate-limiting on queries with Hammer

Closes #67

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

.sobelow-skips

@@ -40,3 +40,4 @@ FE1EEB91EA633570F703B251AE2D4D4E
 7EEC79571F3F7CEEB04A8B86D908382A
 E7967805C1EA5301F2722C7BDB2F25F3
 BDFB0FB1AAF69C18212CBCFD42F8B717
+40220A533CCACB3A1CE9DBF1A8A430A1

config/config.exs

@@ -321,6 +321,9 @@ config :mobilizon, Oban,
     {Oban.Plugins.Pruner, max_age: 300}
   ]
 
+config :hammer,
+  backend: {Hammer.Backend.ETS, [expiry_ms: 60_000 * 60 * 4, cleanup_interval_ms: 60_000 * 10]}
+
 config :mobilizon, :rich_media,
   parsers: [
     Mobilizon.Service.RichMedia.Parsers.OEmbed,

lib/graphql/authorization.ex

@@ -44,6 +44,9 @@ defmodule Mobilizon.GraphQL.Authorization do
   def get_user_role(%{role: role}), do: role
   def get_user_role(nil), do: nil
 
+  @impl true
+  def get_ip(%{ip: ip}), do: ip
+
   @impl true
   def unauthorized_message(resolution) do
     case Map.get(resolution.context, :current_user) do

lib/graphql/schema/event.ex

@@ -15,6 +15,9 @@ defmodule Mobilizon.GraphQL.Schema.EventType do
   import_types(Schema.Events.ParticipantType)
   import_types(Schema.TagType)
 
+  @env Application.compile_env(:mobilizon, :env)
+  @event_rate_limiting 60
+
   @desc "An event"
   object :event do
     meta(:authorize, :all)
@@ -437,6 +440,8 @@ defmodule Mobilizon.GraphQL.Schema.EventType do
         args: %{organizer_actor_id: :organizer_actor_id}
       )
 
+      middleware(Rajska.RateLimiter, limit: event_rate_limiting(@env))
+
       resolve(&Event.create_event/3)
     end
 
@@ -505,4 +510,7 @@ defmodule Mobilizon.GraphQL.Schema.EventType do
       resolve(&Event.delete_event/3)
     end
   end
+
+  defp event_rate_limiting(:test), do: @event_rate_limiting * 1000
+  defp event_rate_limiting(_), do: @event_rate_limiting
 end

lib/graphql/schema/media.ex

@@ -6,6 +6,9 @@ defmodule Mobilizon.GraphQL.Schema.MediaType do
 
   alias Mobilizon.GraphQL.Resolvers.Media
 
+  @env Application.compile_env(:mobilizon, :env)
+  @media_rate_limiting 60
+
   @desc "A media"
   object :media do
     meta(:authorize, :all)
@@ -77,6 +80,8 @@ defmodule Mobilizon.GraphQL.Schema.MediaType do
         args: %{}
       )
 
+      middleware(Rajska.RateLimiter, limit: media_rate_limiting(@env))
+
       resolve(&Media.upload_media/3)
     end
 
@@ -95,4 +100,7 @@ defmodule Mobilizon.GraphQL.Schema.MediaType do
       resolve(&Media.remove_media/3)
     end
   end
+
+  defp media_rate_limiting(:test), do: @media_rate_limiting * 1000
+  defp media_rate_limiting(_), do: @media_rate_limiting
 end

lib/graphql/schema/user.ex

@@ -7,12 +7,17 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
   import Absinthe.Resolution.Helpers, only: [dataloader: 2]
 
   alias Mobilizon.Events
-  alias Mobilizon.GraphQL.Resolvers.{Application, Media, User}
+  alias Mobilizon.GraphQL.Resolvers.Application, as: ApplicationResolver
+  alias Mobilizon.GraphQL.Resolvers.{Media, User}
   alias Mobilizon.GraphQL.Resolvers.Users.ActivitySettings
   alias Mobilizon.GraphQL.Schema
 
   import_types(Schema.SortType)
 
+  @env Application.compile_env(:mobilizon, :env)
+  @user_ip_limit 10
+  @user_email_limit 5
+
   @desc "A local user of Mobilizon"
   object :user do
     meta(:authorize, :all)
@@ -180,7 +185,7 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
       description: "The user's authorized authentication apps",
       meta: [private: true, rule: :forbid_app_access]
     ) do
-      resolve(&Application.get_user_applications/3)
+      resolve(&ApplicationResolver.get_user_applications/3)
     end
   end
 
@@ -331,6 +336,8 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
       arg(:password, non_null(:string), description: "The new user's password")
       arg(:locale, :string, description: "The new user's locale")
       middleware(Rajska.QueryAuthorization, permit: :all)
+      middleware(Rajska.RateLimiter, limit: user_ip_limiter(@env))
+      middleware(Rajska.RateLimiter, keys: :email, limit: user_email_limiter(@env))
       resolve(&User.create_user/3)
     end
 
@@ -349,6 +356,8 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
       arg(:email, non_null(:string), description: "The email used to register")
       arg(:locale, :string, description: "The user's locale")
       middleware(Rajska.QueryAuthorization, permit: :all)
+      middleware(Rajska.RateLimiter, limit: user_ip_limiter(@env))
+      middleware(Rajska.RateLimiter, keys: :email, limit: user_email_limiter(@env))
       resolve(&User.resend_confirmation_email/3)
     end
 
@@ -357,6 +366,8 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
       arg(:email, non_null(:string), description: "The user's email")
       arg(:locale, :string, description: "The user's locale")
       middleware(Rajska.QueryAuthorization, permit: :all)
+      middleware(Rajska.RateLimiter, limit: user_ip_limiter(@env))
+      middleware(Rajska.RateLimiter, keys: :email, limit: user_email_limiter(@env))
       resolve(&User.send_reset_password/3)
     end
 
@@ -377,6 +388,8 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
       arg(:email, non_null(:string), description: "The user's email")
       arg(:password, non_null(:string), description: "The user's password")
       middleware(Rajska.QueryAuthorization, permit: :all)
+      middleware(Rajska.RateLimiter, limit: user_ip_limiter(@env))
+      middleware(Rajska.RateLimiter, keys: :email, limit: user_email_limiter(@env))
       resolve(&User.login_user/3)
     end
 
@@ -480,4 +493,10 @@ defmodule Mobilizon.GraphQL.Schema.UserType do
       resolve(&User.update_locale/3)
     end
   end
+
+  defp user_ip_limiter(:test), do: @user_ip_limit * 1000
+  defp user_ip_limiter(_), do: @user_ip_limit
+
+  defp user_email_limiter(:test), do: @user_email_limit * 1000
+  defp user_email_limiter(_), do: @user_email_limit
 end

lib/service/auth/applications.ex

@@ -230,6 +230,9 @@ defmodule Mobilizon.Service.Auth.Applications do
       %ApplicationDeviceActivation{status: :access_denied} ->
         {:error, :access_denied}
 
+      %ApplicationDeviceActivation{status: :pending} ->
+        {:error, :pending, @device_code_interval}
+
       nil ->
         {:error, :incorrect_device_code}
 

lib/web/controllers/application_controller.ex

@@ -15,6 +15,14 @@ defmodule Mobilizon.Web.ApplicationController do
         conn,
         %{"name" => name, "redirect_uris" => redirect_uris, "scope" => scope} = args
       ) do
+    ip = conn.remote_ip |> :inet.ntoa() |> to_string()
+
+    case Hammer.check_rate(
+           "create_application:#{ip}",
+           60_000,
+           10
+         ) do
+      {:allow, _} ->
         case Applications.create(
                name,
                String.split(redirect_uris, "\n"),
@@ -54,6 +62,19 @@ defmodule Mobilizon.Web.ApplicationController do
                 )
             })
         end
+
+      {:deny, _} ->
+        conn
+        |> Plug.Conn.put_status(429)
+        |> json(%{
+          "error" => "slow_down",
+          "error_description" =>
+            dgettext(
+              "errors",
+              "Too many requests"
+            )
+        })
+    end
   end
 
   def create_application(conn, _args) do
@@ -148,7 +169,7 @@ defmodule Mobilizon.Web.ApplicationController do
           "error_description" =>
             dgettext(
               "errors",
-              "No application with this client_id was found"
+              "No application was found with this client_id"
             )
         })
 
@@ -231,6 +252,37 @@ defmodule Mobilizon.Web.ApplicationController do
             )
         })
 
+      {:error, :pending, interval} ->
+        case Hammer.check_rate(
+               "generate_device_access_token:#{client_id}:#{device_code}",
+               interval * 1_000,
+               1
+             ) do
+          {:allow, _} ->
+            conn
+            |> Plug.Conn.put_status(400)
+            |> json(%{
+              "error" => "authorization_pending",
+              "error_description" =>
+                dgettext(
+                  "errors",
+                  "The authorization request is still pending"
+                )
+            })
+
+          {:deny, _} ->
+            conn
+            |> Plug.Conn.put_status(400)
+            |> json(%{
+              "error" => "slow_down",
+              "error_description" =>
+                dgettext(
+                  "errors",
+                  "Please slow down the rate of your requests"
+                )
+            })
+        end
+
       {:error, :access_denied} ->
         conn
         |> Plug.Conn.put_status(400)
@@ -247,7 +299,7 @@ defmodule Mobilizon.Web.ApplicationController do
         conn
         |> Plug.Conn.put_status(400)
         |> json(%{
-          "error" => "invalid_grant",
+          "error" => "expired_token",
           "error_description" =>
             dgettext(
               "errors",

mix.exs

@@ -210,7 +210,8 @@ defmodule Mobilizon.Mixfile do
       {:unplug, "~> 1.0.0"},
       {:replug, "~> 0.1.0"},
       {:exkismet, github: "tcitworld/exkismet"},
-      {:rajska, github: "churcho/rajska", branch: "fix/update-absinthe"},
+      {:rajska, github: "tcitworld/rajska", branch: "mobilizon"},
+      {:hammer, "~> 6.1"},
       # Dev and test dependencies
       {:phoenix_live_reload, "~> 1.2", only: [:dev, :e2e]},
       {:ex_machina, "~> 2.3", only: [:dev, :test]},

mix.lock

@@ -71,6 +71,7 @@
   "guardian_db": {:hex, :guardian_db, "2.1.0", "ec95a9d99cdd1e550555d09a7bb4a340d8887aad0697f594590c2fd74be02426", [:mix], [{:ecto, "~> 3.0", [hex: :ecto, repo: "hexpm", optional: false]}, {:ecto_sql, "~> 3.1", [hex: :ecto_sql, repo: "hexpm", optional: false]}, {:guardian, "~> 1.0 or ~> 2.0", [hex: :guardian, repo: "hexpm", optional: false]}, {:postgrex, "~> 0.13", [hex: :postgrex, repo: "hexpm", optional: true]}], "hexpm", "f8e7d543ac92c395f3a7fd5acbe6829faeade57d688f7562e2f0fca8f94a0d70"},
   "guardian_phoenix": {:hex, :guardian_phoenix, "2.0.1", "89a817265af09a6ddf7cb1e77f17ffca90cea2db10ff888375ef34502b2731b1", [:mix], [{:guardian, "~> 2.0", [hex: :guardian, repo: "hexpm", optional: false]}, {:phoenix, "~> 1.3", [hex: :phoenix, repo: "hexpm", optional: false]}], "hexpm", "21f439246715192b231f228680465d1ed5fbdf01555a4a3b17165532f5f9a08c"},
   "hackney": {:hex, :hackney, "1.18.1", "f48bf88f521f2a229fc7bae88cf4f85adc9cd9bcf23b5dc8eb6a1788c662c4f6", [:rebar3], [{:certifi, "~> 2.9.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~> 6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~> 1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~> 1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.3.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~> 1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~> 0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "a4ecdaff44297e9b5894ae499e9a070ea1888c84afdd1fd9b7b2bc384950128e"},
+  "hammer": {:hex, :hammer, "6.1.0", "f263e3c3e9946bd410ea0336b2abe0cb6260af4afb3a221e1027540706e76c55", [:make, :mix], [{:poolboy, "~> 1.5", [hex: :poolboy, repo: "hexpm", optional: false]}], "hexpm", "b47e415a562a6d072392deabcd58090d8a41182cf9044cdd6b0d0faaaf68ba57"},
   "haversine": {:hex, :haversine, "0.1.0", "14240e90dae07c9459f538d12a811492f655d95fc68f999403503b4f6c4ec522", [:mix], [], "hexpm", "54dc48e895bc18a59437a37026c873634e17b648a64cb87bfafb96f64d607060"},
   "html_entities": {:hex, :html_entities, "0.5.2", "9e47e70598da7de2a9ff6af8758399251db6dbb7eebe2b013f2bbd2515895c3c", [:mix], [], "hexpm", "c53ba390403485615623b9531e97696f076ed415e8d8058b1dbaa28181f4fdcc"},
   "http_signatures": {:hex, :http_signatures, "0.1.1", "ca7ebc1b61542b163644c8c3b1f0e0f41037d35f2395940d3c6c7deceab41fd8", [:mix], [], "hexpm", "cc3b8a007322cc7b624c0c15eec49ee58ac977254ff529a3c482f681465942a3"},
@@ -117,9 +118,10 @@
   "plug": {:hex, :plug, "1.14.1", "3148623796853ae96c628960b833bf6b6a894d6bdc8c199ef7160c41149b71f2", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:plug_crypto, "~> 1.1.1 or ~> 1.2", [hex: :plug_crypto, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "a0e789be21a576b11ec55a0983e4e8f7c7b07d88dfb3b8da9e97767132271d40"},
   "plug_cowboy": {:hex, :plug_cowboy, "2.6.1", "9a3bbfceeb65eff5f39dab529e5cd79137ac36e913c02067dba3963a26efe9b2", [:mix], [{:cowboy, "~> 2.7", [hex: :cowboy, repo: "hexpm", optional: false]}, {:cowboy_telemetry, "~> 0.3", [hex: :cowboy_telemetry, repo: "hexpm", optional: false]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "de36e1a21f451a18b790f37765db198075c25875c64834bcc82d90b309eb6613"},
   "plug_crypto": {:hex, :plug_crypto, "1.2.5", "918772575e48e81e455818229bf719d4ab4181fcbf7f85b68a35620f78d89ced", [:mix], [], "hexpm", "26549a1d6345e2172eb1c233866756ae44a9609bd33ee6f99147ab3fd87fd842"},
+  "poolboy": {:hex, :poolboy, "1.5.2", "392b007a1693a64540cead79830443abf5762f5d30cf50bc95cb2c1aaafa006b", [:rebar3], [], "hexpm", "dad79704ce5440f3d5a3681c8590b9dc25d1a561e8f5a9c995281012860901e3"},
   "postgrex": {:hex, :postgrex, "0.16.5", "fcc4035cc90e23933c5d69a9cd686e329469446ef7abba2cf70f08e2c4b69810", [:mix], [{:connection, "~> 1.1", [hex: :connection, repo: "hexpm", optional: false]}, {:db_connection, "~> 2.1", [hex: :db_connection, repo: "hexpm", optional: false]}, {:decimal, "~> 1.5 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:table, "~> 0.1.0", [hex: :table, repo: "hexpm", optional: true]}], "hexpm", "edead639dc6e882618c01d8fc891214c481ab9a3788dfe38dd5e37fd1d5fb2e8"},
   "progress_bar": {:hex, :progress_bar, "2.0.1", "7b40200112ae533d5adceb80ff75fbe66dc753bca5f6c55c073bfc122d71896d", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm", "2519eb58a2f149a3a094e729378256d8cb6d96a259ec94841bd69fdc71f18f87"},
-  "rajska": {:git, "https://github.com/churcho/rajska.git", "5da424969d5f40dcab690d3a25b248f85f712823", [branch: "fix/update-absinthe"]},
+  "rajska": {:git, "https://github.com/tcitworld/rajska.git", "0c036448e261e8be6a512581c592fadf48982d84", [branch: "mobilizon"]},
   "ranch": {:hex, :ranch, "1.8.0", "8c7a100a139fd57f17327b6413e4167ac559fbc04ca7448e9be9057311597a1d", [:make, :rebar3], [], "hexpm", "49fbcfd3682fab1f5d109351b61257676da1a2fdbe295904176d5e521a2ddfe5"},
   "remote_ip": {:hex, :remote_ip, "1.1.0", "cb308841595d15df3f9073b7c39243a1dd6ca56e5020295cb012c76fbec50f2d", [:mix], [{:combine, "~> 0.10", [hex: :combine, repo: "hexpm", optional: false]}, {:plug, "~> 1.14", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "616ffdf66aaad6a72fc546dabf42eed87e2a99e97b09cbd92b10cc180d02ed74"},
   "replug": {:hex, :replug, "0.1.0", "61d35f8c873c0078a23c49579a48f36e45789414b1ec0daee3fd5f4e34221f23", [:mix], [{:plug, "~> 1.8", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "f71f7a57e944e854fe4946060c6964098e53958074c69fb844b96e0bd58cfa60"},

test/graphql/resolvers/user_test.exs

@@ -384,6 +384,7 @@ defmodule Mobilizon.GraphQL.Resolvers.UserTest do
           variables: @user_creation
         )
 
+      assert res["errors"] == nil
       assert res["data"]["createUser"]["email"] == @user_creation.email
 
       res =

test/web/controllers/application_controller_test.exs

@@ -108,7 +108,7 @@ defmodule Mobilizon.Web.ApplicationControllerTest do
 
       assert error = json_response(conn, 400)
       assert error["error"] == "invalid_client"
-      assert error["error_description"] == "No application with this client_id was found"
+      assert error["error_description"] == "No application was found with this client_id"
     end
 
     test "with a scope not matching app registered scopes", %{conn: conn} do
@@ -277,12 +277,58 @@ defmodule Mobilizon.Web.ApplicationControllerTest do
         )
 
       assert error = json_response(conn, 400)
-      assert error["error"] == "invalid_grant"
+      assert error["error"] == "expired_token"
 
       assert error["error_description"] ==
                "The given device_code has expired"
     end
 
+    test "with a pending authorization", %{conn: conn} do
+      user = insert(:user)
+
+      {:ok, app} =
+        Applications.create("My app", ["hello"], "write:event:create write:event:update")
+
+      assert {:ok, _res} =
+               Mobilizon.Applications.create_application_device_activation(%{
+                 device_code: "hello",
+                 user_code: "world",
+                 expires_in: 600,
+                 application_id: app.id,
+                 scope: "write:event:create write:event:update",
+                 status: "pending",
+                 user_id: user.id
+               })
+
+      conn =
+        conn
+        |> Plug.Conn.put_req_header("accept", "application/json")
+        |> post("/oauth/token",
+          grant_type: "urn:ietf:params:oauth:grant-type:device_code",
+          client_id: app.client_id,
+          device_code: "hello"
+        )
+
+      error = json_response(conn, 400)
+
+      assert error["error"] == "authorization_pending"
+      assert error["error_description"] == "The authorization request is still pending"
+
+      conn =
+        Phoenix.ConnTest.build_conn()
+        |> Plug.Conn.put_req_header("accept", "application/json")
+        |> post("/oauth/token",
+          grant_type: "urn:ietf:params:oauth:grant-type:device_code",
+          client_id: app.client_id,
+          device_code: "hello"
+        )
+
+      error = json_response(conn, 400)
+
+      assert error["error"] == "slow_down"
+      assert error["error_description"] == "Please slow down the rate of your requests"
+    end
+
     test "with valid params as JSON", %{conn: conn} do
       user = insert(:user)